0
When discussing harmonics in relation to Transformers, generally you're thinking of harmonics in the current waveform - if it's a 60Hz transformer, the 2nd harmonic would be 120Hz, and is usually very high on transformer energization (referred to as inrush current). The nonlinearity of the core can result in core saturation under multiple different conditions, which tend to produce harmonic currents.
Wiki User
∙ 12y ago
Wiki User
∙ 13y agoHarmonics are frequencies higher than the fundamental. There are two types of harmonics: even harmonics and odd harmonic. For example: 2 x 60 hertz = 120 hertz is even harmonic, and 3 x 60 = 180 hertz is third harmonic. Even harmonic is like a D.C. current mixed with the A.C. current and could have more disturbance than odd harmonic. Fourier analysis could be used for decomposition of both types of harmonics.
Wiki User
∙ 14y agoit is the sinusoidal frequency distortion to the fundamental frequency.
Wiki User
∙ 10y agoIn the electrical power field the term harmonics means electrical currents and voltages that appear within the electrical power system resulting from non-linear electric loads.
Add your answer:
Earn +20 pts
Why is the Neutral fundamental in a three phase Y-Y Transformer connection?
Suppression of harmonics
Why excitation transformer vector group is only DY5?
This is basically to reduce the harmonics injected back in the grid which are generated because of the controller rectifier circuit (Thyristor Bridge - B6C) after the transformer secondary.
What is the difference between the inrush current and the fault current?
Magnetizing inrush current has bigger 2nd harmonics compare to short circuit current. the second harmonics content is about >60% of fundamental harmonic. magnetizing inrush current happened when we energised the transformer, and short circuit current happened if there is a short circuit between different alive phase.
Is odd harmonics present in push pull amplifier?
Odd harmonics are theoretically the only harmonics that are produced by a push-pull amplifier, and even the level of odd harmonics should be very low.
What is idmt over current relay with different plug setting multiplier?
Any nonlinear load on a system generates harmonics. Exampes are the magnetic core of a transformer or equipment which uses rectifiers to produce direct current. The triplen harmonics are unpopular because they add on a three-phase system, so they produce current in the neutral, which a three-phase system in balance does not.
Why the need of harmonics in single phase transformer?
Harmonics are really not needed in single phase transformers.
What is the 3rd harmonics in transformer?
The third harmonic is tree times the fundamental frequency.
Why is the Neutral fundamental in a three phase Y-Y Transformer connection?
Suppression of harmonics
Can a transformer that operates on 60hz also operate on 50hz?
Yes, but it may generate more harmonics
Why phase displacement is maintained between primary and secondary windings of the transformer?
To eliminate certain harmonics.
What is the reason of harmonics in transformer and induction motor?
To be very brief, Harmonics are caused because of magnetising current flowing in the primary of transformer, which cause deaviation from the ideal sinusoidal waveform producing peaky currents in the primary. Due to this the core of the transformer gets saturated and the wave form produced in the secondary also gets distorted.
Why excitation transformer vector group is only DY5?
This is basically to reduce the harmonics injected back in the grid which are generated because of the controller rectifier circuit (Thyristor Bridge - B6C) after the transformer secondary.
What is meant by transformer charging?
Most likely this is referring to the initial inrush that occurs when a transformer is energized. The core of a transformer is designed for a specific magnetic field strength; When a transformer is switched into a circuit, it usually will not be switched at exactly a voltage peak. When the voltage is at its' peak, the induced magnetic field will be at zero. If the switching occurs at a voltage zero, the magnetic field strength will attempt to climb to double the designed value; since the transformer core is not generally oversized to this degree, it will saturate. This causes large inflows of current to the transformer, and shows up as even harmonics (mainly second harmonics) in the current waveform. This settles out within a few seconds (generally) to a small energizing current, usually less than 1% of the transformer's rated current.
Application of Y-delta transformations?
delta-wye is a common type of 3-phase transformer configuration. It offers a good voltage gain and the delta transformer is useful in unstable systems for removing the third harmonics. The transformation is necessary for analyzing the circuit.
What guitar has the best harmonics?
There are no best harmonics.
What is triplen harmonics?
The triplen harmonics are defined as the odd multiples of the 3rd harmonic (ex. 3rd, 9th, 15th, 21st etc.). Triplen harmonics are of particular concern because they are zero sequence harmonics, unlike the fundamental, which is positive sequence. The consequence of this fact is that the magnitude of these currents on the 3 phases are additive in the neutral. This can lead to very large currents circulating in the neutral, and unless the neutral is sufficiently oversized this can present a fire hazard. These currents can also circulate in the transformer causing significant overheating there too. Single-phase power supplies for equipment such as electronic ballasts and PCs are the most significant source of Triplen harmonics
When was Psy-Harmonics created?
Psy-Harmonics was created in 1993.
